Response of a warm stellar disk to an adiabatically grown quadropole bar. The bar amplitude is grown over ≈41.5 bar periods and then held steady for 4π or two disk rotations at R₀ = 1. The background potential is logarithmic and the initial DF is a Dehnen DF with h_R = R₀/3, h_σ = R₀, and σ_R = 0.2v_c. The bar potential is of the form in Equation (24) with R_OLR = 0.9R₀ or Ω_b = 1.9Ω₀, a current angle between the major axis of the bar and the ϕ = 0 direction of 25°, and a dimensionless bar amplitude of α = 0.01. The three panels show the response in mean radial velocity , mean rotational velocity minus the axisymmetric mean (), and the vertex deviation l_v. As expected, the response in all three has ϕ → ϕ + 180° symmetry. The mean velocity responds most strongly near the outer Lindblad resonance, indicated by the white dashed line, and at corotation, which lies at R = 0.52R₀. The bar can induce vertex deviations of typically 15° near the outer Lindblad resonance and around R = 1.3R₀.